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Commitments and Contingencies - Additional Information (Detail) |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 14, 2018 USD ($) | Dec. 07, 2017 USD ($) | Oct. 04, 2017 USD ($) | Jun. 30, 2017 USD ($) | Apr. 10, 2017 USD ($) | Mar. 13, 2017 USD ($) | Dec. 30, 2017 USD ($) Lawsuits | Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Self-insurance reserves, current liabilities |  |  |  |  |  |  | $ 30,100,000 | $ 28,000,000
Alleged complaints | Lawsuits |  |  |  |  |  |  | 33 |
Settlement Funds |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  | $ 800,000 |  |  |  |  |  |
Settlement Funds | Subsequent Event |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement | $ 400,000 |  |  |  |  |  |  |
Attorneys Fees |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  | 600,000 |  |  |  |  |  |
Attorneys Fees | Subsequent Event |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement | 900,000 |  |  |  |  |  |  |
Incentive Payments |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  | 100,000 |  |  |  |  |  |
Incentive Payments | Subsequent Event |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement | 100,000 |  |  |  |  |  |  |
Class and / or Collective action treatment |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  | 22 |
Individual claims and do not seek class or collective action treatment |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Alleged complaints | Lawsuits |  |  |  |  |  |  | 16 |
Preliminary Approval of Class Action | Settlement Funds |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  | $ 1,200,000 |  |  |  |  |
Preliminary Approval of Class Action | Attorneys Fees |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  | 2,900,000 |  |  |  |  |
Preliminary Approval of Class Action | Incentive Payments |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  | 200,000 |  |  |  |  |
Preliminary Approval of Class Action | Coyle - Arizona |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  | $ 4,300,000 |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Jul. 20, 2015 |
Martinez - California |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Jul. 07, 2015 |
Rosinbaum - NorthCarolina |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Dec. 01, 2015 |
McCurley - Carolina |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  | $ 1,500,000 |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Jan. 20, 2016 |
Neff - Vermont |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Dec. 02, 2015 |
Noll - Maine |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Dec. 03, 2015 |
Zapata - Texas |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Mar. 14, 2016 |
Rodriguez - Texas |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Jan. 28, 2016 |
Richard - Louisiana |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Oct. 21, 2015 |
Carr - Pennsylvania |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Dec. 01, 2015 |
Boulange Pennsylvania |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Mar. 25, 2016 |
Soares - California |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Oct. 26, 2015 |
Medrano - Mexico |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Apr. 27, 2016 |
Schucker - New York |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | May 09, 2016 |
Schucker - New York | Subsequent Event |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement | $ 1,300,000 |  |  |  |  |  |  |
Long - Tennessee |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Apr. 20, 2017 |
Wiatrek Texas |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Aug. 15, 2017 |
North Carolina Class Action |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  |  | $ 9,000,000 |  |  |  |
Lawsuit filing date |  |  |  |  |  |  | Sep. 12, 2012 |
North Carolina Class Action | Settlement Funds |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  |  | 5,200,000 |  |  |  |
North Carolina Class Action | Attorneys Fees |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  |  | $ 3,800,000 |  |  |  |
Connecticut Class Action |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  |  |  |  | $ 1,250,000 |  |
Lawsuit filing date |  |  |  |  |  |  | Jan. 06, 2015 |
Tennessee Class Action |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement |  |  |  |  | $ 250,000 |  |  |
Lawsuit filing date |  |  |  |  |  |  | Jul. 02, 2015 |

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